(Note: you have to catch Bulbasaur, Charmander, Squirtle, Pikachu, 
Omastar and Ninetales!) To get ChronoMew you have to pick Bulbasaur, 
Charmander, Squirtle, Pikachu, Omastar and Ninetales then at the 
battle screen press A, B, B, A, C-Left, C-Right then START. You 
should hear a mew's cry then gets lower then growls. It'll pause, 
press start to battle with your new ChronoMew. (WARNING!!! If you 
press any diffrent button to start the battle all data will be 
erased that is all.) Get Snubbles:
Go to the main screen and type in A, B, Z, Z, R, L, L, C-Left. You 
will here a noise that represents that is worked.